I installed a Radeon ATI XFX HD 4650 PCI, 2DDR, 1gig, video card into my vista desktop 3 months ago, and it worked perfectly. I only needed it to run 2 mintors a dvi and a vga. Yesterday I attempted to install Windows 7 and both screens went black.The device manager was unable to locate any video cards at all (the original had been removed). I called Dell, and they told me that the card was not recognized, and therefore not compatible with "7". Then I called Radeon, and they said it was definitely compatible. The bottom line is I had to do a system restore to get back to Vista where all worked well again. i really need "7". HELP! bruceled@yahoo.com